Mobilink package conversion

Its been a week i bought mobilink jazz sim as i want to off my orignal number for few weeks but i think i made a mistake to chose mobilink as whenever i try to call 123 to chage my package my call is disconnected when i press 0 mentioned by the computer i am fed up with pathetic jazz help line call is never being answered is there anyother way like sending sms to chage package as i want to go on jazz budget?????????/

Inform to PTA sent email